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3 years ago

9

What has a larger wavelength the color iolet or the color red?explain?

2 answers:

horsena [70]3 years ago

4 0

Red has the longer wavelength. Wavelength and frequency are inversely related, so the longer the wavelength, the lower the frequency. This lower frequency is them perceived by our eye as the color red.

Nady [450]3 years ago

3 0

Answer:

its red

Explanation:

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A softball is thrown perfectly vertically (straight-up) at 18 m/s.

inessss [21]

Answer:

a) y = 16.51 [m]

b) t = 1.83 [s]

Explanation:

To solve this problem we must use two kinematics equations, the first to determine the height to which the ball reaches, and the second equation to determine how long it lasts in the air.

$v_{f} ^{2}= v_{i} ^{2} - (2*g*t)\\$

where:

Vf = final velocity = 0

Vi = initial velocity = 18 [m/s]

g = gravity acceleration = 9.81[m/s^2]

t = time [s]

Note: the negative sign of the Equation indicates that the acceleration of gravity acts in the opposite direction to the movement of the ball. The final velocity is zero, since the ball reaches its maximum altitude when the velocity is zero.

Now replacing:

0 = (18)^2 - (2*9.81*y)

y = 16.51 [m]

b)

$v_{f} = v_{i} - (g*t)$

0 = 18 - (9.81*t)

t = 1.83 [s]

8 0

3 years ago

A 60 kg person runs up a 30° ramp with a constant acceleration. She starts from rest at the bottom of the ramp and covers a dist

Sladkaya [172]

We have that the instantaneous power is

$P=1239.6W$

From the question we are told that

A 60 kg person runs up a 30° ramp

distance of 15 m up the ramp in 5.8 s.

t = 4.0 s?

Generally the equation for the Force is mathematically given as

$F-mgsin\theta=ma\\\\F-60*9.8*sin30=60*a$

Where

$s=ut+1/2at^2\\\\15=+0.5*a*5.8^2\\\\\a=0.891\\\\$

Therefore

$F=60(0.891)+294\\\\F=347.5$

Where

$v=u+at\\\\v=3.567$

Now

$P=f*v\\\\P=347.50*3.567$

$P=1239.6W$

For more information on this visit

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7 0

3 years ago

A speck of dust with mass 12 mg and electric charge 10 μC is released from rest in a uniform electric field of magnitude 850 N/C

Marta_Voda [28]

Answer:

$a=708.3m/s^2$

Explanation:

The force experimented by a charge <em>q </em>in a uniform electric field <em>E</em><em> </em>is <em>F=qE</em>.

Newton's 2nd Law tells us that the relation between acceleration <em>a</em> a mass <em>m </em>experiments when a force <em>F </em>is applied to it is <em>F=ma</em>.

Combining these equations we have <em>am=qE</em>, and since we want the acceleration of the speck of dust, we substitute our values:

$a=\frac{qE}{m}=\frac{(10\times10^{-6}C)(850N/C)}{12\times10^{-6}Kg}=708.3m/s^2$

4 0

3 years ago

Two ac generators supply the same voltage. However, the first generator has a frequency of 1.2 kHz, and the second has a frequen

astra-53 [7]

Answer:

I_2 = 0.146 A

Explanation:

The formula for current in an inductor is;

I_rms = V_rms/X_L

Where X_L is inductance wirh formula 2πfL

So, I_rms = V_rms/X_L

Applying this to the two generators, we have;

First generator;

I_1 = V_rms/(2π(f_1)L)

And I_2 = V_rms/(2π(f_2)L)

Thus, to find the current in the second generator, we divide eq 1 by eq 2;

So,

I_2/I_1 = [V_rms/(2π(f_2)L)]/[V_rms/(2π(f_1)L)]

Some values will cance out leaving us with;

I_2/I_1 = f_1/f_2

I_2 = I_1(f_1/f_2)

Plugging in the relevant values ;

I_2 = 0.56(1.2/4.6)

I_2 = 0.146 A

6 0

4 years ago

bearhunter [10]

Answer:

0 is your answereeeeerrrrr

5 0

3 years ago